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not detect outdoor tube sensor malfunction; Other outdoor sensors after unit turned on start to detect malfunction, outdoor
each sensor continuously 30s does not in the temperature upper limit or down limit will alarm.
Indoor: Under any status to test indoor each sensor malfunction, continuously 30s does not during the temperature upper
and down limit, will alarm.
Upper and lower limits of temperature sensors
Indoor ambient sensor (sensor with 15K resistance and connected with a 15K resistance) ≤ -40°C
≥ 142°C
Indoor inlet tube sensor (sensor with 20K resistance and connected with a 20K resistance) ≤ -40°C
≥ 136°C
Indoor central tube sensor (sensor with 20K resistance and connected with a 20K resistance) ≤ -40°C
≥ 136°C
Indoor outlet tube sensor (sensor with 20K resistance and connected with a 20K resistance) ≤ -40°C
≥ 136°C
Outdoor ambient sensor (sensor with 15K resistance and connected with a 15K resistance) ≤ -40°C
≥ 142°C
Outdoor tube temperature sensor (sensor with 20K resistance and connected with a 20K resistance) ≤ -40°C
≥ 136°C
Outdoor air exhaust sensor (sensor with 50K resistance and connected with a 15K resistance)
≤ -26°C ≥ 140°C
7.2.6.7 Anti-high temperature protection under Heat mode
If detected some indoor unit tube temperature is very high, that the indoor unit will stop running after arrived at preset
temperature, if tube temperature resumed, the compressor will resume to run.
7.2.6.8 Compressor delay protection
Due to each protection, malfunction arrived at the temperature, after compressor stopped running, when restart up, there
will be 3mins delay, power off exception.
7.2.6.9 Compressor high-pressure protection
After high-pressure protection malfunction happened, if continuously detected compressor high-pressure switch closed, it
need to power off, then re-power on, the whole unit will resume to run.
7.2.6.10 Compressor overload protection
If detected the compressor overload switch act, it will run at indoor temperature arrive at presetting temperature condition,
the unit will stop and display corresponding malfunction, compressor stopped for 3mins above and compressor overload
switch reset, the whole unit will automatically resume to running status. Protection times exceeds 6 times (if compressor
continuously running time exceed 7min, that the protection times will clear 0) without automatically response, it need to
power off and re-power on for resume.
7.2.6.11 Demagnetization current protection
When detected demagnetization current value is larger than regulative value, compressor will stop running.
7.2.6.12 Compressor startup
Compressor start up at 30 Hz frequency, after start up, according to whole unit capacity requirement rise frequency
running. During raise up to the target frequency, each protection condition (including frequency raise condition and current
protection condition) will act.
7.2.6.13 PFC act
After outdoor unit sent turn on order to drive board, PFC will turn on at once, after 3s the compressor will start up after
compressor stop running, PFC will stop working at once.
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